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Error in orbits on neo's?

Posted: 25.03.2002, 08:07
by Incognito
I was checking out the encounter with 2002 Em7 for mar 8 and found that it was nowhere near the 500,000 km that it passed by us. I went to http://neo.jpl.nasa.gov/neo/close.html and checked out some of the future passes by toutatis and they are way off in Celestia :?

Posted: 25.03.2002, 09:02
by chris
Which version of Celestia are you using? I've confirmed that it gets within 400,000 km of Earth late on March 7th--this is closer than the actual encounter, and I suspect that the error is due to using a simple ellipse to model the orbit of 2002 EM7. The Toutatis approaches are also approximately correct.

--Chris

Posted: 25.03.2002, 17:31
by Incognito
I am using 1.2.3 on windows. The program reports 1.2.2 as it's version but the file i dl'd was 1.2.3. I'll email you some pics of some encounters listed in the link above

btw thanks for this awesome program. I've had nonstop fun since i intalled it a couple of days ago. I even was doing flybys of mars with Gustav Holsts Mars theme cranked :D

Posted: 25.03.2002, 19:02
by chris
I figured out what's happening . . . the problem is due to the sign error I introduced in some of the orbital calculations in 1.2.3. This has been fixed for 1.2.4 (preview coming soon!)

--Chris